Sexual desire surrounding tango with one musician (6)
I believe the answer is:
lutist
'musician' is the definition.
(I've seen this before)
'sexual desire surrounding tango with one' is the wordplay.
'sexual desire' becomes 'lust' (lust is a kind of sexual desire).
'surrounding' is an insertion indicator.
'tango' becomes 'T' (phonetic alphabet: alpha, bravo, charlie etc.).
'with' is a charade indicator (letters next to each other).
'one' becomes 'I' (Roman numeral).
't'+'i'='ti'
'lust' going around 'ti' is 'LUTIST'.
(Other definitions for lutist that I've seen before include "musician" , "string player" .)